Experimental study on factors affecting water migration in frozen morin clay

The amount of water migration in an unsaturated frozen soil, morin clay, was determined in horizontally closed soil columns under linear temperature gradients. The temperature at the warm end of the soil column was belot/ its freezing point at the initial water content in order to keep the soil specimen always in the frozen state during testing. The flux of water migration was calculated from the distribution curves of the total water content before and after testing. Four factors affecting the flux, including temperature, temperature gradient, test duration and the dry density of the soil, were investigated. It was found that the flux is directly proportional to the temperature gradient, is inversely proportional to the square root of the test duration, decreases with the decrease in temperature in the power law form, and changes with the dry density. The behavior of water migration in unsaturated, frozen morin clay is something like that in the unsaturated, unfrozen soils.